Order Ganoidei is a term used to refer to a group of primitive fish that possess a bony skeleton and ganoid scales. However, there are several synonyms that can be used to describe this order of fish. One such synonym is Neopterygii, which is a term used to describe fish with a bony skeleton and a more advanced structure of their fins. Another synonym is Holostei, which describes fish with a complete, fully ossified skeleton. Finally, the term Chondrostei can also be used to describe Order Ganoidei, although this label is more typically used to describe a different group of primitive fish. Regardless of the terminology used, Order Ganoidei represents an important group of fish that has helped to shape the evolutionary history of aquatic life.